summaryrefslogtreecommitdiffstats
path: root/libmpdemux/demux_rawdv.c
blob: 503a906fe1b33ad14cbd0476eae138036b9d24bf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
/*
	raw dv file parser for MPlayer
   by Alexander Neundorf <neundorf@kde.org>
   based on the fli demuxer

   LGPL
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "config.h"

#include "mp_msg.h"
#include "help_mp.h"

#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"

#include <libdv/dv.h>
#include <libdv/dv_types.h>

#define DV_PAL_FRAME_SIZE  144000
#define DV_NTSC_FRAME_SIZE 122000

typedef struct
{
   int current_frame;
   int frame_size;
   off_t current_filepos;
   int frame_number;
   dv_decoder_t *decoder;
} rawdv_frames_t;

static void demux_seek_rawdv(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags)
{
   rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
   sh_video_t *sh_video = demuxer->video->sh;
   off_t newpos=(flags&SEEK_ABSOLUTE)?0:frames->current_frame;
   if(flags&SEEK_FACTOR)
   {
      // float 0..1
      newpos+=rel_seek_secs*frames->frame_number;
   }
   else
   {
      // secs
      newpos+=rel_seek_secs*sh_video->fps;
   }
   if(newpos<0)
      newpos=0;
   else if(newpos>frames->frame_number)
      newpos=frames->frame_number;
   frames->current_frame=newpos;
   frames->current_filepos=newpos*frames->frame_size;
}

static int rawdv_check_file(demuxer_t *demuxer)
{
   unsigned char tmp_buffer[DV_PAL_FRAME_SIZE];
   int bytes_read=0;
   int result=0;
   dv_decoder_t *td;

   mp_msg(MSGT_DEMUX,MSGL_V,"Checking for DV\n");

   bytes_read=stream_read(demuxer->stream,tmp_buffer,DV_PAL_FRAME_SIZE);
   if ((bytes_read!=DV_PAL_FRAME_SIZE) && (bytes_read!=DV_NTSC_FRAME_SIZE))
      return 0;

   td=dv_decoder_new(TRUE,TRUE,FALSE);
   if (!td)
      return 0;

   td->quality=DV_QUALITY_BEST;
   result=dv_parse_header(td, tmp_buffer);
   if (result<0)
      return 0;

   if ((( td->num_dif_seqs==10) || (td->num_dif_seqs==12))
       && (td->width==720)
       && ((td->height==576) || (td->height==480)))
      result=1;
   dv_decoder_free(td);
   if (result)
      return DEMUXER_TYPE_RAWDV;
   else
      return 0;
}

// return value:
//     0 = EOF or no stream found
//     1 = successfully read a packet
static int demux_rawdv_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
{
   rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
   demux_packet_t* dp_video=NULL;
   sh_video_t *sh_video = demuxer->video->sh;
   int bytes_read=0;
//   fprintf(stderr,"demux_rawdv_fill_buffer() seek to %qu, size: %d\n",frames->current_filepos,frames->frame_size);
   // fetch the frame from the file
   // first, position the file properly since ds_read_packet() doesn't
   // seem to do it, even though it takes a file offset as a parameter
   stream_seek(demuxer->stream, frames->current_filepos);

   dp_video=new_demux_packet(frames->frame_size);
   bytes_read=stream_read(demuxer->stream,dp_video->buffer,frames->frame_size);
   if (bytes_read<frames->frame_size)
      return 0;
   dp_video->pts=frames->current_frame/sh_video->fps;
   dp_video->pos=frames->current_filepos;
   dp_video->flags=0;

   if (demuxer->audio && demuxer->audio->id>=-1)
   {
      demux_packet_t* dp_audio=clone_demux_packet(dp_video);
      ds_add_packet(demuxer->audio,dp_audio);
   }
   ds_add_packet(demuxer->video,dp_video);
   // get the next frame ready
   frames->current_filepos+=frames->frame_size;
   frames->current_frame++;
//   fprintf(stderr," audio->packs: %d , video->packs: %d \n",demuxer->audio->packs, demuxer->video->packs);
   return 1;
}

static demuxer_t* demux_open_rawdv(demuxer_t* demuxer)
{
   unsigned char dv_frame[DV_PAL_FRAME_SIZE];
   sh_video_t *sh_video = NULL;
   rawdv_frames_t *frames = malloc(sizeof(rawdv_frames_t));
   dv_decoder_t *dv_decoder=NULL;

   mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() end_pos %"PRId64"\n",(int64_t)demuxer->stream->end_pos);

   // go back to the beginning
   stream_reset(demuxer->stream);
   stream_seek(demuxer->stream, 0);

   //get the first frame
   stream_read(demuxer->stream, dv_frame, DV_PAL_FRAME_SIZE);

   //read params from this frame
   dv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
   dv_decoder->quality=DV_QUALITY_BEST;

   if (dv_parse_header(dv_decoder, dv_frame) == -1)
	   return NULL;

   // create a new video stream header
   sh_video = new_sh_video(demuxer, 0);
   if (!sh_video)
	   return NULL;

   // make sure the demuxer knows about the new video stream header
   // (even though new_sh_video() ought to take care of it)
   demuxer->seekable = 1;
   demuxer->video->sh = sh_video;

   // make sure that the video demuxer stream header knows about its
   // parent video demuxer stream (this is getting wacky), or else
   // video_read_properties() will choke
   sh_video->ds = demuxer->video;

   // custom fourcc for internal MPlayer use
//   sh_video->format = mmioFOURCC('R', 'A', 'D', 'V');
   sh_video->format = mmioFOURCC('D', 'V', 'S', 'D');

   sh_video->disp_w = dv_decoder->width;
   sh_video->disp_h = dv_decoder->height;
   mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() frame_size: %d w: %d h: %d dif_seq: %d system: %d\n",dv_decoder->frame_size,dv_decoder->width, dv_decoder->height,dv_decoder->num_dif_seqs,dv_decoder->system);

   sh_video->fps= (dv_decoder->system==e_dv_system_525_60?29.97:25);
   sh_video->frametime = 1.0/sh_video->fps;

  // emulate BITMAPINFOHEADER for win32 decoders:
  sh_video->bih=malloc(sizeof(BITMAPINFOHEADER));
  memset(sh_video->bih,0,sizeof(BITMAPINFOHEADER));
  sh_video->bih->biSize=40;
  sh_video->bih->biWidth = dv_decoder->width;
  sh_video->bih->biHeight = dv_decoder->height;
  sh_video->bih->biPlanes=1;
  sh_video->bih->biBitCount=24;
  sh_video->bih->biCompression=sh_video->format; // "DVSD"
  sh_video->bih->biSizeImage=sh_video->bih->biWidth*sh_video->bih->biHeight*3;


   frames->current_filepos=0;
   frames->current_frame=0;
   frames->frame_size=dv_decoder->frame_size;
   frames->frame_number=demuxer->stream->end_pos/frames->frame_size;

   mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() seek to %qu, size: %d, dv_dec->frame_size: %d\n",frames->current_filepos,frames->frame_size, dv_decoder->frame_size);
    if (dv_decoder->audio != NULL && demuxer->audio->id>=-1){
       sh_audio_t *sh_audio =  new_sh_audio(demuxer, 0);
       demuxer->audio->id = 0;
	    demuxer->audio->sh = sh_audio;
	    sh_audio->ds = demuxer->audio;
       mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() chan: %d samplerate: %d\n",dv_decoder->audio->num_channels,dv_decoder->audio->frequency );
       // custom fourcc for internal MPlayer use
       sh_audio->format = mmioFOURCC('R', 'A', 'D', 'V');

	sh_audio->wf = malloc(sizeof(WAVEFORMATEX));
	memset(sh_audio->wf, 0, sizeof(WAVEFORMATEX));
	sh_audio->wf->wFormatTag = sh_audio->format;
	sh_audio->wf->nChannels = dv_decoder->audio->num_channels;
	sh_audio->wf->wBitsPerSample = 16;
	sh_audio->wf->nSamplesPerSec = dv_decoder->audio->frequency;
	// info about the input stream:
	sh_audio->wf->nAvgBytesPerSec = sh_video->fps*dv_decoder->frame_size;
	sh_audio->wf->nBlockAlign = dv_decoder->frame_size;

//       sh_audio->context=(void*)dv_decoder;
    }
   stream_reset(demuxer->stream);
   stream_seek(demuxer->stream, 0);
   dv_decoder_free(dv_decoder);  //we keep this in the context of both stream headers
   demuxer->priv=frames;
   return demuxer;
}

static void demux_close_rawdv(demuxer_t* demuxer)
{
   rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;

   if(frames==0)
      return;
  free(frames);
}

static int demux_rawdv_control(demuxer_t *demuxer,int cmd, void *arg) {
    rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
    sh_video_t *sh_video=demuxer->video->sh;

    switch(cmd) {
        case DEMUXER_CTRL_GET_TIME_LENGTH:
            *((double *)arg)=(double)frames->frame_number / sh_video->fps;
            return DEMUXER_CTRL_OK;

        case DEMUXER_CTRL_GET_PERCENT_POS:
            *((int *)arg)=(int)(frames->current_frame * 100. / frames->frame_number);
            return DEMUXER_CTRL_OK;

        default:
            return DEMUXER_CTRL_NOTIMPL;
    }
}


const demuxer_desc_t demuxer_desc_rawdv = {
  "Raw DV demuxer",
  "rawdv",
  "RAWDV",
  "Alexander Neundorf",
  "",
  DEMUXER_TYPE_RAWDV,
  0, // unsafe autodetect
  rawdv_check_file,
  demux_rawdv_fill_buffer,
  demux_open_rawdv,
  demux_close_rawdv,
  demux_seek_rawdv,
  demux_rawdv_control
};